<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div 
            class="button-wrapper" 
            v-for="item of hot" 
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" 
          v-for="(item, key) of cities" 
          :key="key"
          :ref="key"    
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div 
            class="item border-bottom" 
            v-for="innerItem of item" 
            :key="innerItem.id"
            @click="handleCityClick(innerItem.name)"
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from "better-scroll";
import { mapState, mapMutations } from 'vuex'
export default {
  name: "CityList",
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  data() {
    return {};
  },
  methods: {
    handleCityClick(city) {
      this.changeCity(city)
      this.$router.push('/home')
    },
    ...mapMutations(['changeCity']) 
  },
  mounted() {
    this.scroll = new Bscroll(this.$refs.wrapper);
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  watch: {
    letter() {
      if(this.letter) {
        const element = this.$refs[this.letter]
        this.scroll.scrollToElement(element[0])
      }
    }
  },
};
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl';

.border-topbottom {
  &:before {
    border-color: #ccc;
  }

  &:after {
    border-color: #ccc;
  }
}

.border-bottom {
  &:before {
    border-color: #ccc;
  }
}

.list {
  overflow: hidden;
  position: absolute;
  top: 1.58rem;
  left: 0;
  right: 0;
  bottom: 0;
}

.title {
  line-height: 0.54rem;
  background: #eee;
  padding-left: 0.2rem;
  color: #666;
  font-size: 0.26rem;
}

.button-list {
  overflow: hidden;
  padding: 0.1rem 0.6rem 0.1rem 0.1rem;
}

.button-wrapper {
  float: left;
  width: 33.33%;
}

.button {
  margin: 0.1rem;
  padding: 0.1rem 0;
  text-align: center;
  border: 0.02rem solid #ccc;
  border-radius: 0.06rem;
}

.item {
  line-height: 0.76rem;
  padding-left: 0.2rem;
}
</style>